Musical instrument strap retainer



FIG. 1 is a front perspective view of, a musical instrument strapretainer showing our new design;

FIG. 2 is a back view thereof; showing our new design;

FIG. 3 is a left-side view thereof; showing our new design; and,

FIG. 4 is a bottom-plan view thereof; showing our new design.

CLAIM The ornamental design for a musical instrument strap retainer, asshown.